CN218090730U - Environment-friendly anti-seepage retaining dam - Google Patents

Abstract

The utility model discloses an environment-friendly seepage-proofing water retaining dam, which comprises a dam foundation, a curtain grouting seepage-proofing wall, sprayed concrete, a concrete cover plate, a clay core wall seepage-proofing body, a transition reverse filtering layer, a rock-fill dam body, a dam crest, concrete feet, an upstream face dam slope, a downstream face dam slope, a dam feet drainage ditch and a cushion drainage layer in the dam; the dam foundation is arranged on a foundation cleaning surface at the lower end of the dam body, the curtain grouting impervious wall is arranged at the lower end of the dam body and embedded into bedrock after penetrating through the dam foundation, the outer surface of the clay core wall impervious wall is connected with the transition reverse filtering layer, the top surface of the transition reverse filtering layer at the top is connected with the dam crest, the dam toe drainage ditch is arranged at the back surface of the dam body, the back surface dam slope is arranged between the dam crest and the dam toe drainage ditch, and the mattress drainage layer in the dam is arranged on the top surface of the dam foundation at the back surface. The utility model discloses simple structure is firm, has guaranteed the stability of dam foundation and the safety of dam body, has improved security, feature of environmental protection and the prevention of seepage nature of manger plate dam.

Description

Environment-friendly anti-seepage retaining dam

Technical Field

The utility model relates to a hydraulic construction technical field, in particular to environment-friendly prevention of seepage manger plate dam.

Background

The common retaining dam device mainly has the function of retaining water, some retaining dams are formed by filling clay and rockfill materials, and the retaining dam device also has the following defects: cracks, leakage, landslide and dam end leakage, the structure is unstable, and potential safety hazards are easy to generate. The conventional construction method is to increase the width of the bottom of the dam by slowing down the slope of the downstream dam, but the method increases the engineering quantity of the dam and moves the center line of the dam upstream, thereby increasing the construction cost and prolonging the construction period.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a simple structure stabilizes, water blocking effect is better guarantees clay core rock-fill dam safety and stability's manger plate dam is provided. In order to solve the above problems, the utility model discloses a take certain measure, structural section of clay core rock-fill dam improves, adopt trapezoidal section to dam foundation further optimization simultaneously, adopt open cut backfill cut-off basin + curtain grout scheme, set up curtain grout cut-off wall, solve dam foundation prevention of seepage and infiltration deformation problem, adopt environment-friendly anti-filtration material to reach the soil conservation, the drainage, through effective measures such as clay core impervious body, curtain grout cut-off wall, curtain grout, interior mattress drainage, thereby solve dam body crack, the seepage, the landslide, the unstable problem of dam end seepage structure, thereby make dam foundation, the seepage prevention structural connection is a whole, and is safe and reliable more.

The technical scheme of the utility model as follows:

an environment-friendly impermeable water retaining dam comprises a dam foundation, a curtain grouting impermeable wall, sprayed concrete, a concrete cover plate, a clay core wall impermeable body, a transition reverse filter layer, a rock-fill dam body, a dam crest, concrete feet, an upstream dam slope, a downstream dam slope, a dam foot drainage ditch and a mattress drainage layer in the dam; the dam foundation is arranged on a clean base surface at the lower end of the dam body, the curtain grouting impervious wall is arranged at the lower end of the dam body and embedded into bedrock after penetrating through the dam foundation, the top of the curtain grouting impervious wall is connected with the sprayed concrete and the concrete cover plate, the top surface of the sprayed concrete is connected with the concrete cover plate, the sprayed concrete and the concrete cover plate play a role in weighting, the rock is prevented from being lifted by grouting pressure, grouting pressure is kept, grout bleeding is prevented, the top surfaces of the sprayed concrete and the concrete cover plate are connected with the clay core wall impervious body, the outer surface of the clay core wall impervious body is connected with the transition reverse filter layer, the outside of the transition reverse filter layer on both sides is connected with the rock-fill dam body, and the top surface of the transition reverse filter layer at the top is connected with the dam crest, and the dam foot of the rock-fill dam body facing the water surface is connected with the concrete fixing foot to prevent the dam foot from being washed by wind waves and water waves, so that the stability of the dam foot is fixed, the leakage of the dam body is prevented, the water retaining dam surface between the concrete fixing foot and the dam crest is provided with the facing dam slope, the dam foot of the back surface of the dam body is provided with the dam foot drainage ditch, the dam crest is provided with the back surface dam slope, and the top surface of the dam base of the back surface is provided with the mattress drainage layer in the dam and is connected with the back surface slope.

Furthermore, the parts of the dam foundation on the two sides of the dam axis are of a sunken structure.

Further, for solving dam foundation prevention of seepage and infiltration deformation problem, adopt the open cut to backfill cut-off tank + curtain grout scheme, cut-off tank central line position is in dam axis upper reaches department, and the cut-off tank degree of depth passes in the gravel layer deepens to the basement rock, and the cut-off tank bottom arranges the curtain grout, gets into relative impervious blanket at the bottom of the curtain, curtain grout impervious wall is located the upper reaches of manger plate axis, two rows of curtain grouts are arranged to the curtain grout impervious wall under the basement rock, the bottom of two rows of curtains stretches into the certain degree of depth of relative impervious rock stratum and forms closed curtain to prevent or reduce the infiltration of groundwater in the dam foundation. And (3) adopting an encryption curtain grouting treatment measure for rock bases in the fault fracture zone and other small fault fracture zone influence ranges to encrypt the rock bases into 3 rows of curtains, wherein 2 encrypted rows are arranged on the upstream side surface of the main curtain, and the depth of the encrypted rows is the same as that of the grouting impervious wall of the main curtain.

Further, the clay core wall seepage-proofing body is formed by filling, leveling, rolling and vibrating clay in a layered mode, and the clay is the clay which reaches the optimal water content and the maximum dry volume weight after passing a rolling test; the rockfill dam body is formed by filling, leveling, rolling and vibrating stones in a layering mode, and the stones reach the optimal water content and the maximum dry volume weight after passing the test. The optimal water content is the water content corresponding to the soil or the mixture with the maximum dry density obtained by a standard compaction test. Maximum dry volume weight is the maximum dry density of the soil or mix obtained by standard compaction tests.

Furthermore, the dam top comprises a reinforced concrete wave wall, a concrete curb, a cement gravel cushion, a cement stabilized gravel cushion and an asphalt concrete pavement, the reinforced concrete wave wall is arranged on one side of the upstream surface of the dam top, the foundation of the reinforced concrete wave wall is connected with the clay core wall seepage-proofing body, the concrete curb is arranged on one side of the back surface of the dam top, and the cement gravel cushion, the cement stabilized gravel cushion and the asphalt concrete pavement are sequentially arranged between the reinforced concrete wave wall and the concrete curb from bottom to top.

Furthermore, the upstream face dam slope comprises precast concrete interlocking blocks, a fine crushed stone cushion layer, a coarse crushed stone cushion layer and a berm, wherein the coarse crushed stone cushion layer, the fine crushed stone cushion layer and the precast concrete interlocking blocks are paved in a layered mode from bottom to top, the berm is arranged on the fine crushed stone cushion layer in the middle of the upstream face dam slope, and the berm is narrow and used for transporting small equipment and checking by constructors.

Further, the backwater surface dam slope comprises a dry masonry block stone slope protection, a kerb, a dam back way and a dam foot drainage layer, the dam back way is arranged in the middle of the backwater surface dam slope, and the dam back way wider is used for vehicle traffic and can be led to a reservoir management living area. The way both sides set up behind the dam the curb, the curb both sides set up dry brickwork block stone bank protection, the dry brickwork block stone bank protection inboard of surface of a river dam slope lower part sets up dam foot drainage blanket, dam foot drainage blanket includes geotechnological cloth, fine sand gravel bed course and the coarse gravel bed course of laying from bottom to top.

Further, the dam foot escape canal is including thick masonry block stone, gravel stone bed course, it lays to thick masonry block stone down the gravel stone bed course, the dam foot escape canal with dry masonry block stone bank protection, the dam foot drainage blanket of surface of a river dam slope link to each other and form drainage channel. Dam toe escape canal collects the dam body infiltration for survey the seepage flow, reduce the dam body infiltration, make the dam body more firm.

Furthermore, the mattress drainage layer in the dam comprises fine particles of a reverse filtration layer, coarse particles of the reverse filtration layer and a transition layer paved on the top layer from bottom to top, and the mattress drainage layer in the dam is connected with the dam foot drainage layer of the dam slope on the back surface. The transition reverse filtering layer on the back water surface, the mattress drainage layer in the dam, the dam foot drainage layer on the back water surface dam slope and the dam foot drainage ditch form a drainage system, and the uplift pressure of permeable water flow on the water retaining dam can be reduced so as to ensure the stability of the dam foundation and the safety of the dam body.

Furthermore, the dam crest, the upstream dam slope and the downstream dam slope are all provided with anti-scouring structures, so that the erosion of water to the dam body is effectively prevented, and the service life of the dam body is prolonged. The dam crest adopts asphalt concrete pavement as the scour prevention structure, the upstream face dam slope adopts precast concrete interlocking piece as the scour prevention structure, the backwater face dam slope adopts dry brickwork block stone bank protection as the scour prevention structure to prevent the dam body from producing crack and dam body landslide. Grass seeds are planted on the dam slope of the back water surface, and the ecological environment is beautified.

Furthermore, the joint surface between the dam abutment of the retaining dam and the mountain and the rock mass at the upper part of the dam abutment of the two banks of the dam have high water permeability, and the seepage possibility exists. And adopting a measure for prolonging the treatment of the dam seepage-proofing curtain. The left bank and the right bank extend to the normal water storage level and the position opposite to the impervious layer, and the bottom of the curtain controls the curtains on the two sides to be respectively provided with two rows of grouting holes by the opposite impervious line so as to achieve the anti-seepage effect of the dam end. And (3) adopting an encryption curtain grouting treatment measure for rock foundations within the influence range of the fault fracture zone and other small fault fracture zones, and encrypting into 3 rows of curtains, wherein 2 encrypted rows are arranged on the upstream side of the main curtain, and the depth of each row is the same as that of the grouting impervious wall of the main curtain. The seepage-proofing and seepage-proofing deformation of the dam body is safe and stable.

Furthermore, the dam body section of the retaining dam is trapezoidal, and the building materials used by the retaining dam are all environment-friendly materials meeting the standard requirements.

The utility model has the advantages that:

the utility model provides a dam foundation prevention of seepage and infiltration deformation problem adopt open cut to backfill cut-off groove + curtain grout scheme, sets up the cut-off groove in dam axis upper reaches department, and the cut-off groove degree of depth passes the gravel layer and deepens to the basement rock in. The dam foundation is filled on a clean base surface, a dam body can be effectively stabilized, curtain grouting is arranged at the bottom of a water cut-off groove, a curtain grouting impervious wall is inserted into the dam body and extends into a lower base rock to be arranged into two rows of curtain grouting, the top of the curtain grouting impervious wall is connected with the bottom of a clay core wall impervious body through a concrete spraying and concrete cover plate, the bottom of the curtain grouting impervious wall enters a relative impervious layer to form a closed curtain to prevent or reduce the permeation of underground water in the dam foundation, a transition reverse filter layer close to the downstream side, a mattress drainage layer in the dam, a dam foot drainage layer of a dam foot and a dam foot drainage ditch form a drainage system, and the uplift pressure of low-permeability water flow on a water retaining dam can be reduced to ensure the stability of the dam foundation and the safety of the dam body.

Drawings

FIG. 1 is a schematic view of the environment-friendly impermeable water retaining dam of the present invention;

FIG. 2 is an enlarged view of the dam crest of FIG. 1;

FIG. 3 is an enlarged view of the upstream dam slope of FIG. 1;

FIG. 4 is an enlarged view of the dam slope of the backing surface of FIG. 1;

FIG. 5 is a schematic view of the structure of the drainage layer of the mattress in the dam.

Reference numerals:

1. a dam crest; 2. a dam slope of the back surface; 3. a dam foot drainage ditch; 4. the upstream face dam slope; 5. fixing the concrete feet; 6. a dam foundation; 7. curtain grouting impervious walls; 8. spraying concrete; 9 a concrete cover plate; 10. a rock-fill dam body; 11. a transition inverted filter layer; 12. a clay core impervious body; 13. a mattress drainage layer in the dam; 14. reinforced concrete wave walls; 15. a cement gravel cushion layer; 16. a cement stabilized macadam cushion layer; 17. asphalt concrete pavement; 18. concrete curbs; 19 a coarse crushed stone cushion; 20. a finely-divided stone cushion layer; 21. a horse way; 22. prefabricating a concrete interlocking block; 23. dry masonry block stone slope protection; 24. a curb; 25. a dam back path; 26. a course gravel stone cushion; 27. a fine sand gravel cushion layer; 28. geotextile; 29. a transition layer; 30. coarse particles of the inverted filter layer; 31. and (5) filtering fine particles of the layer.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1-5, an environment-friendly impermeable water retaining dam comprises a dam foundation 6, a curtain grouting impermeable wall 7, sprayed concrete 8, a concrete cover plate 9, a clay core wall impermeable body 12, a transition reverse filter layer 11, a rock-fill dam body 10, a dam crest 1, a concrete fixing foot 5, an upstream dam slope 4, a downstream dam slope 2, a dam foot drainage ditch 3 and a mattress drainage layer 13 in the dam; the dam foundation 6 is arranged on a clean base surface at the lower end of the dam body, the curtain grouting impervious wall 7 is arranged at the lower end of the dam body and embedded into bedrock after penetrating through the dam foundation 6, the top of the curtain grouting impervious wall 7 is connected with the sprayed concrete 8 and the concrete cover plate 9, the top surface of the sprayed concrete 8 is connected with the concrete cover plate 9, the sprayed concrete 8 and the concrete cover plate 9 play a role in weight, the grouting pressure is prevented from lifting rock, the grouting pressure is kept, grout bleeding is prevented, the top surfaces of the sprayed concrete 8 and the concrete cover plate 9 are connected with the clay core wall impervious body 12, the outer surface of the clay core wall impervious body 12 is connected with the transition reverse filter layer 11, the outer sides of the transition reverse filtering layers 11 on the two sides are connected with the rockfill dam body 10, the top surface of the transition reverse filtering layer 11 on the top is connected with the dam crest 1, the dam foot position of the rockfill dam body 10 facing the water surface is connected with the concrete fixing foot 5, the dam foot is prevented from being washed by wind waves and water waves, the stability of the dam foot is fixed, the seepage of the dam body is prevented, the water retaining dam surface between the concrete fixing foot 5 and the dam crest 1 is provided with the upstream dam slope 4, the dam foot position on the back surface of the dam body is provided with the dam foot drainage ditch 3, the dam slope 2 on the back surface is arranged between the dam crest 1 and the dam foot drainage ditch 3, and the top surface of the dam foundation 6 on the back surface is provided with the dam inner cushion drainage layer 13 connected with the dam slope 2 on the back surface. The base cleaning surface is formed by removing floating mud, dregs, silt, impurities and the like on the surface of the dam foundation 6 by an earthwork machine according to design requirements, flattening the floating mud, the dregs, the silt, the impurities and the like, rolling and vibrating by using a bump, and sprinkling water by using a sprinkling truck to serve as a joint surface of the dam foundation 6.

Furthermore, the dam foundation 6 is of a sinking structure at two sides of the dam axis.

Further, in order to solve the problems of seepage prevention and seepage deformation of the dam foundation 6, the scheme of open cut backfill water cut-off tank and curtain grouting is adopted, the center line of the water cut-off tank is located at the upstream of the axis of the dam, the depth of the water cut-off tank penetrates through a gravel layer and extends into bedrock, the curtain grouting is arranged at the bottom of the water cut-off tank, the curtain grouting is to inject grout into cracks and pores of the rock or soil layer to form a continuous water-blocking curtain so as to reduce seepage flow and seepage pressure, the curtain grouting impervious wall 7 is located at the upstream of the axis of the dam, two rows of curtain grouting are arranged below the bedrock on the curtain grouting impervious wall 7, the top of the curtain grouting impervious wall is connected with the bottom of the clay core wall impervious body 12 through concrete spraying 8 and a concrete cover plate 9, the bottom of the curtain grouting impervious wall extends into the depth of the opposite impervious rock layer to be more than 5m, and a closed curtain is formed so as to prevent or reduce the seepage of underground water in the dam foundation 6. And (3) adopting an encryption curtain grouting treatment measure for rock foundations within the influence range of the fault fracture zone and other small fault fracture zones to encrypt the rock foundations into 3 rows of curtains, wherein 2 encrypted rows are arranged on the upstream side surface of the main curtain, and the depth of the encrypted rows is the same as that of the grouting impervious wall 7 of the main curtain.

Further, the clay core wall seepage-proofing body 12 is filled in the dam body and is wrapped by the transition reverse filtering layer 11, the transition reverse filtering layer 11 close to the downstream side and the dam inner mattress drainage layer 13, the geotextile 28, the fine gravel material cushion layer 27, the coarse gravel material cushion layer 26, the dry blockstone protection slope 23 and the dam foot drainage ditch 3 form a drainage system to jointly act, so that the uplift pressure of the water flow on the water retaining dam can be reduced, and the seepage line can be reduced to ensure the stability of the dam foundation 6 and the safety of the dam body.

Further, the clay core wall impervious body 12 is formed by filling, leveling, rolling and vibrating clay in a layered mode, wherein the clay is the clay which reaches the optimal water content and the maximum dry volume weight after passing a rolling test; the rock-fill dam body 10 is formed by filling, leveling, rolling and vibrating stones in a layering manner, and the stones reach the optimal water content and the maximum dry volume weight after passing the test.

Further, the dam crest 1 comprises a reinforced concrete wave wall 14, a concrete curb 18, a cement gravel cushion 15, a cement stabilized gravel cushion 16 and an asphalt concrete pavement 17, the reinforced concrete wave wall 14 is arranged on the upstream side of the dam crest 1, the foundation of the reinforced concrete wave wall 14 is connected with the clay core wall impervious body 12, the concrete curb 18 is arranged on the downstream side of the dam crest 1, and the cement gravel cushion 15, the cement stabilized gravel cushion 16 and the asphalt concrete pavement 17 are sequentially arranged between the reinforced concrete wave wall 14 and the concrete pavement 18 from bottom to top.

Further, the upstream face dam slope 4 comprises a precast concrete interlocking block 22, a fine gravel cushion layer 20, a coarse gravel cushion layer 19 and a berm 21, the coarse gravel cushion layer 19, the fine gravel cushion layer 20 and the precast concrete interlocking block 22 are laid in a layered manner from bottom to top, the berm 21 is arranged on the fine gravel cushion layer 20 in the middle of the upstream face dam slope 4, and the berm 21 is narrower and is used for transporting small equipment and checking by constructors.

Further, backing surface dam slope 2 includes dry brickwork lump stone bank protection 23, curb 24, dam back way 25 and dam foot drainage blanket, backing surface dam slope 2 middle parts set up dam back way 25, dam back way 25 both sides set up curb 24, curb 24 both sides set up dry brickwork lump stone bank protection 23, the dry brickwork lump stone bank protection 23 inboard of 2 lower parts of backing surface dam slope sets up dam foot drainage blanket, dam foot drainage blanket includes geotechnological cloth 28, fine sand gravel bed course 27 and the coarse gravel bed course 26 of laying from bottom to top.

Further, dam foot escape canal 3 is including thick liquid brickwork lump stone, gravel stone bed course, lay under the thick liquid brickwork lump stone the gravel stone bed course, dam foot escape canal 3 with dry brickwork lump stone bank protection 23, the dam foot drainage blanket of surface of a river dam slope 2 link to each other and form drainage channel. The dam foot drainage ditch 3 collects the seepage of the dam body for observing the seepage flow, reduces the seepage of the dam body and enables the dam body to be more stable.

Further, the mattress drainage layer 13 in the dam comprises fine inverted filter particles 31, coarse inverted filter particles 30 and a transition layer 29 laid on the top layer from bottom to top, and the mattress drainage layer 13 in the dam is connected with the dam foot drainage layer of the back dam slope 2. The transition reverse filter layer 11 on the back water surface, the mattress drainage layer 13 in the dam, the dam foot drainage layer of the dam slope 2 on the back water surface and the dam foot drainage ditch 3 form the combined action of a drainage system, the collected dam body seepage water is drained into the dam foot drainage ditch 3, then the collected dam body seepage water is drained into a river channel outside the downstream of the dam body through the dam foot drainage ditch 3, and the uplift pressure of the seepage water flow on the retaining dam can be reduced so as to ensure the stability of the dam foundation 6 and the safety of the dam body. The transition layer 29 only plays a role in transition between an upper structural layer and a lower structural layer to ensure effective transmission of force, the inverted filter layers (inverted filter layer fine particles 31 and inverted filter layer coarse particles 30) in the dam body are arranged on the outer side of the clay core wall impervious body 12 to be protected to prevent the fine particles in the filler from being brought out, and the inverted filter layers play a role in filtering soil and draining water to achieve the effect of reducing the permeability pressure, ensure that the clay core wall impervious body 12 to be protected is not lost, and ensure the stable structure of the clay core wall impervious body 12.

Furthermore, the dam crest 1, the upstream dam slope 4 and the downstream dam slope 2 are all provided with anti-scouring structures, so that scouring of water to the dam body is effectively prevented, and the service life of the dam body is prolonged. The dam crest 1 adopts an asphalt concrete pavement 17 as an anti-scouring structure, the upstream face dam slope 4 adopts a precast concrete interlocking block 22 as an anti-scouring structure, and the downstream face dam slope 2 adopts a dry masonry block stone protection slope 23 as an anti-scouring structure, so that cracks and a dam body landslide are prevented from being generated on the dam body. Grass seeds are planted on the dam slope 2 of the back water surface, and the ecological environment is beautified.

Furthermore, the water permeability of the junction surface between the dam abutment and the mountain of the retaining dam and the rock mass at the upper parts of the dam abutment of the two banks of the dam is high, and the possibility of seepage exists. And adopting a treatment measure for prolonging the anti-seepage curtain of the dam. The left and right banks extend to the normal water storage level and the position opposite to the impervious layer, and the bottom of the curtain controls two rows of grouting holes on the curtains on the two sides by the opposite impervious line so as to achieve the anti-seepage effect of the dam end. And (3) adopting a treatment measure of grouting an encryption curtain for rock foundations in the influence range of the fault fracture zone and other small fault fracture zones, and encrypting into 3 rows of curtains, wherein 2 rows of encryption are arranged on the upstream side of the main curtain, and the depth of the main curtain is the same as that of the grouting impervious wall 7. The seepage-proofing and seepage-proofing deformation of the dam body is safe and stable.

Furthermore, the cross section of the dam body of the retaining dam is trapezoidal, and all building materials used by the retaining dam are environment-friendly materials meeting the standard requirements.

The utility model discloses a work progress:

the dam construction comprises the following steps: after foundation cleaning of a dam foundation 6 and excavation and flattening and rolling of a water intercepting groove and slope building of two side slopes of the water intercepting groove are completed, curtain grouting is conducted on the position close to the upstream of the center line of the dam, rock foundations within the influence range of a fault fracture zone and other small fault fracture zones are subjected to treatment measures of encrypted curtain grouting, 3 rows of curtain grouting are conducted in an encrypted mode, sprayed concrete 8 and a concrete cover plate 9 are poured on a formed curtain grouting impervious wall 7, then filling of a clay core wall impervious body 12, a transition reverse filter layer 11 and a rock-fill dam body 10 is conducted, and when the dam body is filled to the design height of a mattress drainage layer 13 in the dam, laying of a reverse filter layer fine particle 31, a reverse filter layer coarse particle 30, a transition layer 29, a geotextile 28, a fine sand cushion gravel 27 and a coarse gravel cushion 26 at the dam foot is conducted. When the clay core impervious wall body 12 and the rockfill dam body 10 are qualified through a rolling test and then reach the optimal water content and the maximum dry volume weight, filling, and then carrying out the upstream face dam slope 4: constructing a coarse gravel cushion layer 19, a fine gravel cushion layer 20, a berm 21 and a precast concrete interlocking block 22, and constructing a dam slope 2 on the back surface: and constructing a dry masonry block stone revetment 23, a curb 24 and a dam back way 25. And finally, constructing a dam top 1, a reinforced concrete wave wall 14, a concrete curb 18, a cement broken stone cushion 15, a cement stabilized broken stone cushion 16, an asphalt concrete pavement 17 and a dam foot drainage ditch 3. Longitudinal steps are arranged on the upstream dam slope 4 and the downstream dam slope 2 and are respectively connected with the packway 21 and the 25-way dam of the rear dam road and extend to the dam crest 1, so that maintenance and inspection personnel can conveniently check and use the dam.

The construction of the dam crest 1 comprises the following steps: firstly, the reinforced concrete wave wall 14 is cast in place and the concrete curb 18 is pre-buried, then the dam top road construction is carried out, the cement gravel cushion 15, the cement stabilized gravel cushion 16 and the asphalt concrete road 17 are laid firstly.

The construction of the upstream dam slope 4 comprises the following steps: firstly, a coarse gravel cushion layer 19 is laid on the upstream dam slope 4, then a fine gravel cushion layer 20 is laid, and then a precast concrete interlocking block 22 and a packway 21 are laid.

The present invention has been described in detail with reference to the embodiments, but the description is only exemplary of the present invention and should not be construed as limiting the scope of the present invention. The protection scope of the present invention is defined by the claims. Technical scheme, or technical staff in the field is in the utility model technical scheme's inspiration under the utility model discloses a substantial and protection scope, design similar technical scheme and reach above-mentioned technological effect, perhaps to the impartial change that application scope was made and improve etc. all should still belong to the utility model discloses a patent covers within the protection scope. It should be noted that for the sake of clarity, parts of the description of the invention have been omitted which do not have a direct obvious relationship with the scope of protection of the invention, but which are known to the skilled person.

Claims (10)

1. The utility model provides an environment-friendly prevention of seepage manger plate dam which characterized in that: the dam comprises a dam foundation (6), a curtain grouting impervious wall (7), sprayed concrete (8), a concrete cover plate (9), a clay core impervious wall body (12), a transition reverse filter layer (11), a rock-fill dam body (10), a dam crest (1), concrete fixing feet (5), an upstream dam slope (4), a downstream dam slope (2), a dam foot drainage ditch (3) and a mattress drainage layer (13) in the dam; the dam foundation (6) is arranged on the clean base surface at the lower end of the dam body, the curtain grouting impervious wall (7) is arranged at the lower end of the dam body and embedded into bedrock after penetrating through the dam foundation (6), the top of the curtain grouting impervious wall (7) is connected with the sprayed concrete (8) and the concrete cover plate (9), the top surface of the concrete spraying plate (8) is connected with the concrete cover plate (9), the top surfaces of the sprayed concrete (8) and the concrete cover plate (9) are connected with the clay core wall impervious body (12), the outer surface of the clay core wall impervious body (12) is connected with the transition reverse filtering layer (11), the outer sides of the transition reverse filtering layers (11) at two sides are connected with the rockfill dam body (10), the top surface of the transition reverse filtering layer (11) at the top is connected with the dam crest (1), the dam foot of the rockfill dam body (10) facing the water surface is connected with the concrete fixing foot (5), the upstream dam slope (4) is arranged on the surface of the retaining dam between the concrete fixing foot (5) and the dam crest (1), the dam foot drainage ditch (3) is arranged at the dam foot of the back surface of the dam body, the dam foundation is characterized in that the dam slope (2) of the back surface is arranged between the dam crest (1) and the dam foot drainage ditch (3), and the mattress drainage layer (13) in the dam is arranged on the top surface of the dam foundation (6) of the back surface and connected with the dam slope (2) of the back surface.

2. The environment-friendly seepage-proofing water-retaining dam of claim 1, which is characterized in that: the dam foundation (6) is of a sinking structure at the two sides of the dam axis.

3. The environment-friendly impermeable water-retaining dam according to claim 1, characterized in that: the curtain grouting impervious wall (7) is located on the upstream of the axis of the retaining dam, two rows of curtain grouting are arranged below bedrock on the curtain grouting impervious wall (7), and the bottoms of the two rows of curtains extend into a certain depth relative to an impervious rock stratum to form a closed curtain.

4. The environment-friendly seepage-proofing water-retaining dam of claim 1, which is characterized in that: the clay core wall seepage-proofing body (12) is formed by filling, leveling, rolling and vibrating clay in a layered mode, and the clay is the clay which reaches the optimal water content and the maximum dry volume weight after passing a rolling test; the rockfill dam body (10) is formed by filling, leveling, rolling and vibrating stones in layers, and the stones reach the optimal water content and the maximum dry volume weight after passing the test.

5. The environment-friendly impermeable water-retaining dam according to claim 1, characterized in that: the dam crest (1) comprises a reinforced concrete wave wall (14), a concrete curb (18), a cement gravel cushion (15), a cement stabilized gravel cushion (16) and an asphalt concrete pavement (17), wherein the reinforced concrete wave wall (14) is arranged on the upstream side of the dam crest (1), the foundation of the reinforced concrete wave wall (14) is connected with the clay core wall impervious body (12), the concrete curb (18) is arranged on the downstream side of the dam crest (1), and the cement gravel cushion (15), the cement stabilized gravel cushion (16) and the asphalt concrete pavement (17) are sequentially arranged between the reinforced concrete wave wall (14) and the concrete curb (18) from bottom to top.

6. The environment-friendly seepage-proofing water-retaining dam of claim 1, which is characterized in that: the upstream face dam slope (4) comprises a precast concrete interlocking block (22), a fine gravel cushion layer (20), a coarse gravel cushion layer (19) and a berm (21), the coarse gravel cushion layer (19), the fine gravel cushion layer (20) and the precast concrete interlocking block (22) are paved in a layered manner from bottom to top, and the berm (21) is arranged on the fine gravel cushion layer (20) in the middle of the upstream face dam slope (4).

7. The environment-friendly seepage-proofing water-retaining dam of claim 1, which is characterized in that: back surface of water dam slope (2) include dry brickwork block stone bank protection (23), curb (24), dam back way (25) and dam foot drainage blanket, back surface of water dam slope (2) middle part sets up dam back way (25), dam back way (25) both sides set up curb (24), curb (24) both sides set up dry brickwork block stone bank protection (23), dry brickwork block stone bank protection (23) inboard of back surface of water dam slope (2) lower part sets up dam foot drainage blanket, dam foot drainage blanket includes geotechnological cloth (28), fine sand gravel bed course (27) and coarse gravel bed course (26) of laying from bottom to top.

8. The environment-friendly impermeable water-retaining dam according to claim 1, characterized in that: dam foot escape canal (3) are including starching building block stone, gravel stone bed course, lay under the building block stone the gravel stone bed course, dam foot escape canal (3) with dry building block stone bank protection (23), the dam foot drainage blanket of surface of a water dam slope (2) link to each other and form drainage channel.

9. The environment-friendly seepage-proofing water-retaining dam of claim 1, which is characterized in that: the mattress drainage layer (13) comprises fine inverted filter particles (31), coarse inverted filter particles (30) and a transition layer (29) laid on the top layer from bottom to top, and the mattress drainage layer (13) is connected with the dam foot drainage layer of the back dam slope (2).

10. The environment-friendly seepage-proofing water-retaining dam of claim 1, which is characterized in that: the anti-scouring dam is characterized in that the dam crest (1), the upstream face dam slope (4) and the back face dam slope (2) are provided with anti-scouring structures, the dam crest (1) adopts an asphalt concrete pavement (17) as the anti-scouring structures, the upstream face dam slope (4) adopts a precast concrete interlocking block (22) as the anti-scouring structures, and the back face dam slope (2) adopts a dry masonry block stone slope protection (23) as the anti-scouring structures.

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